This marker is great. It was purchased to highlight characters on the keyboard. We've found more uses than we expected, further justiying our purchase. Most recently, I needed to label the outside edge of a three-ring binder. I had chosen a purple vinyl binder we already had in the storage under the aquarium, then proceeded to write the appropriate name the side. Unfortunately, the permanent black ink Sharpie I used for lettering did not sufficiently stand out. I went over the letters with the white marker and, Voila!, problem solved.